Morello said he's not completely certain yet how the show is going to be organized, but he's happy to take part. He says Cornell was a talent like none other whose contributions to music are difficult to quantify.

"One of the greatest rock singers of all time, and from his spectacular rock god presence to his creation of melody to his very unique voice, I think his greatest contribution might have been that he and his band Soundgarden, with the help of one or two other groups —maybe Jane's Addiction and Living Colour — redeemed hard rock music."

Morello credits Soundgarden's humble aesthetic, it's intellectually rich message and unapologetic heavy rock instrumentation with igniting a wave of alternative music. He says it even opened the door for Rage Against the Machine to hit in the '90s.